This is the mold for DIY concrete sink. 

Per Mold:
Length: 16"  (Across)
Width:  17"  (Front-To-Back)
Depth*: 9 1/4"  (At Drain)
Both Molds (2" spacing between):
Length: 30"  (Across)
Width:  17"  (Front-To-Back)
Depth*: 9 1/4"  (At Drain)
*Depth can be adjusted by trimming/sanding down the Mold to your desired depth, but you may lose the Internal Flange that is in the Dura-BLU Molds if you trim very much.
Sides to Dura-BLU Molds have at least a 5° slope to ensure Mold removal from concrete.

Mold Clean-up and Care:
Clean Mold with a sponge after each use. Any dried cement residue can be removed with a scotch-brite pad (as outlined above in the Mold Setup section. A light muriatic acid wash (20:1, 20 parts water to 1 part muriatic acid) can also remove cement scale.
Waxing and buffing the Mold after cleaning it use is recommended to protect the Mold until its next use.
Damage: Any damaged areas (chips, scratches, imperfections, etc.) can be repaired using 2-Part epoxy. Mix the epoxy, clean the damaged area and apply the epoxy to the damaged area. Sand smooth when dry. Wet sanding the Mold will return the damaged area to a high gloss if desired. Bondo can also be used, although it usually won't stick to the Mold as strong as epoxy will.